It'll help, not much but it won't hurt. However no gas additive will deal with the real power-robbers on our cars which are the valves and their notorious carbon buildup. Our cars are direct injected so anything added to the fuel system won't touch the valves. If you want some tangible power back you need to sea foam your valves or strip down your intake and get in there with some B12 and the wire brushes.

i have N52, so would getting them cleaned at my dealership be my best option.

Ehh.. just run a bottle of Techron or BMW branded (probably Techron) through a be done with it. Like others have said it won't hurt but probably won't notice much of a difference. Especially if you already use top tier gasoline to begin with.

Ehh.. just run a bottle of Techron or BMW branded (probably Techron) through a be done with it. Like others have said it won't hurt but probably won't notice much of a difference. Especially if you already use top tier gasoline to begin with.